Loading attachment for tractors



Jungs 1929- T. WERTHMAN 1,718,444

LOADING ATTACHMENT FOR TRACTORS Filed March 21, 1928 6 sheets-sheet 1 aneth,

June 2,5, 1929. r. WERTHMAN LOADING ATTACHMENT FOR TRACTORS e sheets-sheet'. 2

Filed Mann' 21, 1928 June 25,` 1929-. T WERTHMAN 1,718,444

LOADING ATTACHMENT FOR TRACTORS Filed March 21, 1928 e sheets-sheet s Qnmmtoz ttoznaq June 25, 1929.4 T. wr-:RTHMAN LOADING ATTACHMENT FOR TRACTORS Filedmaroh 21, 192s e sheets-sheet 4 June 25,1929. T, WERTHMAN 1,718,444

LOADING ATTACHMENT FOR TRACTORS Filed March 21, 1928 6 Sheets-Sheet 5 o v o 'fheadare Mrt/727mm gwuentoz y June 25, 1929. T. WERTHMAN LOADING ATTACHMENT FOR TRACTOHS `6 Sheets-Sheet .6

Filed March 21, l928 Theadare /Vrm-aim 381,

atto: mq

Patented June 25,l 1929.

`PATENT-lorries. Y

mnaonom: WERTHMAN, or CHEROKEE, rows..

LOADING 'ATTACHMENT FOR TRACTORS.

Application inea March 2 1., 192s.. serial No. 263,573.

'lhe present invention /relates to loadling attachmentsfor tractors, and hasmore particular reference-to the provision of im-- proved means adapted for application to a conventional form of tractor/so that the same may be employed for general loading purposes.4

The primary object of the present invenl tion is to provide an improved attachment of the above kind embodying a loading scoop or the like adapted to be forced into and filled with`the material to be loaded upon forward propulsion of the tractou, poweroperated means to elevate the scoop and-permit the load to be transported'by the tractor to the desired point of deposit, and n'ianuallycontrolled means to trip the scoop and ell'ect dumping of the load.

A further object is to provide simple and eflicient means for raisingr and lowering the scoop 'and adapted to be driven from the usual power take-off -shaft of the tractor.

A still further object is to providean improved attachment of the above kind which .25 may be conveniently controlled by the operator of the tractor, all controls being within reach of the drivers scat.

Another object is to provide eflicicnt means for holding the scoop in loading position, and reliable manually operable means for releasing said holding means and permitting the scoop to tilt and dump its load.

Still another object is to provide an attachmentof theabove kind whichis simple and durable in construction, elieient in use, and4 capable of ready application to a tractor withoutalteration or modification of the tractor construction.

Other objects will appear as the nature of the invention is4 better understood, and the same consists in the novel form, combination and 'arrangement of parts hereinafter more fully described, shown in the accompanymg drawings and claimed. In the drawing:

Figure 1 is a side elevational view of a 4tractor having attached thereto a loading device embodying the present invention. I

. Figure 2 is a fragmentary` top' plan view thereof. l I

Figure 3 is a vertical section taken on line .f5-#3.0i Figure 1. A Figure 4 is a transverse sfection on line of Figure'l. 'I -A AFigure 5 isa fragmentaryvert-ical longitudinal section on line 5-5 of Figure 2'.

substituted.

Figure 6 is an enlarged fragmentary view, partly in side elevation and partly in section,. showing details of the means for holding the scoop in loading position. 60

Figure 7 a section on line 7'-7 of Figure 6. j

Figure 8 is a fragmentary horizontal section through the back of tlie loading fork. i

Figure 9 is an enlarged fragmentary view, 65 partly in side elevation and partly in sec-l tion, showing details of the means for/operating the scmyp raising and loweringmechanism from'the usual powertake-'of shaft ofthe tractor.

Figure 1 0 is a view similarto Figure 1, illustrating a preferred modification of the present invention.

Figure 11 is a fragmentary transverse ,section on line V11-11 of Figure l0. 75

Figure 12 is a fragmentary vertical seetion online 12-12 of Figure 11. ti

Figure 13 is a vertical sectionon line 13-13 of Figure 1l.

Figure Iltis a fragmentary 'top plan view 80 of theconstruction shown in Figure 11; and

'Figure 15 is an enlarged fragmentary detail view, partly in sectiony and partly in side elevation, showing the control lever of Figure 10.

'The drawings illustrate preferred forms ofthe invention which have been successfully constructedand operated, but it is to be understood that minor changes may be made without departing from the spirit of eo the invention. M01-cover, although the machine is shown equipped with a fork f r manure loading-and the like, 'it is apparent that a shovel or other formof scoop maybe o5 In the construction illustrated in Figures 1 'to 9 inclusive, a supporting frame is provided Aincluding a hor1zontal U-shaped basel member adapted to snugly embrace the lower front portion of the tractor body andl composed of an intermediate portion 5 adapted to be suitably secured to and to extend across the front end of the tractor body, and rearwardly projecting legs 6 adapted to extend along the sides of the tractor body to a point 105 .slightly to the rear of the engine hood 7 of the tractor. Embracing the transmission housing -8 ofthe tractor 1s a removable clamping bandl preferably composed of 'a pair of side strap members 9-connected by.`1i0

top vand bottom bolts 10 and 11 and having the rear ends of the legs 6 Vof the base mem- 'ing bar 15, and having bearings 16 on their upper ends in which is journalcd a shaft 17' having a wmduigdruin' 18 secured thereon 4 between the standards.

Secured to the drinn 18 are two hoisting cables '19 which extend forwardly and pass 'around guides 2O attached to a cross bar 21 which c'onnects the front ends of a pair ot vertically sri'inging scoop-carrying .pushbars or arms 22. The cables 19 extend rearwardly from the guides 20 and attach to the connecting bar l5, while the rear ends of the arms 22 are pivoted at Vthe points 12 to the side straps 9 of the clamping band. 'The supporting frame further includes rear.-

wa rdly inclined braces 23 whose forward up- .per endsare rigidly secured to the upper ends of the standards 13 and whose .rear lower ends areattached atthe points 12 to the side straps 9 of the clamping band.

Secured on one end of the drum shaft17 is a worm gear 24 which meshes with a worm 25 on the forward upper end' of a rearwardly inclined.longitudinal shaft 26 whose rear lower endportionis suitably supported by the tractor through the medium of a bea-ring 27. -Journaled on the shaft- 26 and conlined at opposite sides of the bea-ring 27 are bevel gears 28 and 29 which constantly mesh with a bevel gea-r 30 secured on theprojectingend of the usual transverse power takeotl shaft 31-of the tractor, and the outer ends vof the hubs of the gears 28 and 29 are provided with elutch elements 32 and 33 adapted to be respectively engaged by clutch elements on the inner ends of collars 34 and 35 slidably keyed on the shaft 26 as shown in Figure 9, The latter clutch elementsare norlnally disengaged by springs 36 so that the gears 28 and 29 run idle, A control lever 37 is pivotecl to the bearing 27 and carries a pivoted clutchshifting rod 38 having forks engagingthe collars 34 and 35. When the shaft 31 is driven andthe clutch element of collar 34 is in, the shaft 26 will be rotated in one'direction, and when the clutch ele- Inent'of collar 35 is in, the shaft 26 will be rotated in the opposite direction. It is thus apparent that the drum 18 may be driven at will to wind or unwind the cables 19 and raise or lower the scoop-carrying arms 22.

A scoop 39 i-s ivoted at 40 to and between the forward en s of the arms 22, and swiveled to and projecting laterally from the sides of the scoop are pins 41 through which are slidably disposed the threaded forward ends of rods 42 which project rearwardly and slide in tubes 43 hinged at 44 to the arms 22. Nuts 45 'are adjustably threaded on -the rods 42 at opposite sides of the pins 41, and provided vided on the rear ends of the roi-ls 42. It is 4 thus apparent that extensible link connections are provided between the scoop 39 and `the arms 22 to permit limited vertical swingingof'the scoop so that it may be positioned as shown byful'l lines in Figures 1, 5 and 6 to receive and retain a load, or allowed to tilt forwardly as shown by dotted lines in Figurev 1 to dump the load. By adjusting the nuts 45, the effective length ofthe link connections may be set to secure best results, and attached to the bark of the scoop is a rope 48 adapted to be'pulled rearwardly to return the scoop to` loading position after being dumped, the rope 48 being extended rearwardly. over the drum 18 to a point adjacent the lever 37 within convenient reach of the operator of the tractor.

To normally hold the scoop againstv dumping, but to permit it to tilt forwardly and dump when desired, 'I provide a pair of latches 49 that are pivoted at 44 and secured on the ends of rod shaft 49 which is disposed latches 49 from the lugs 47 so as to permit.

the scoop to tilt and dump its load. The lugs 47 and latches 49 have beveled edges so that the lugs may automatically snap behind the latches when the scoop is righted.

It is noted the scoop is so pivoted that it normally swings to dumping position by gravity, and the swinging movement in this directionis limited by engagement of the lugs 47 with the forward end walls of the slots 46. y A Y In the embodiment.illustrated, the scoop 39 is in the form of a manure fork composed of a plurality of spaced parallel L-shaped bars 54 rigidly connected by transverse straps 55 having staples 56 riveted thereto and embracing the bars 54.

In operation, the machine is propelled forwardlv with the scoop 39 lowered, whereby to load the latter. Ilie lever 37 is then op.

erated to clutch one of the gears 28 and 39 to the shaft 26, thereby driving the drum18 and causing'the cablesto swing the arms 22 upwardly. The gear is then unclutched from shaft 26 and the n'iaeliineis then aga-in propelled to position the raised and loaded scoop over a. wagon, manure spreader or the like, whereupon the rope 53 is pulled to release 'the latch'es 49 and permit the scoop to dump the load. The lrope 48 is then pulled to 4right the scoop and latch it in loading position, so that when the arms 22 are again lowered by clutch- -5 4ing the other gear to shaft 26, the machine is ready for-reloading. 4

V In the construction illustrated in Figures to l5 inclusive, a sprocket wheel 60 is secured on oneend of the drum shaft 17 and is 10 operatively connected by a sprocket chain 61 to a further relatively small sprocket wheel A 62 secured on the hub. 63 of the casing of a conventional multiple-disk vclutch 64. The easing of the clutch 64 is mounted on a transverse horizontal counter-shaft 65 so that the latter may freely rotate therein when the clutch is released, and t-he inner disk carry- 'ing element of the clutch is fixed on the shaft 65 to turn therewith so that the casing of the clutch will be lrotated to turn the drum 18 when said clutch is engaged. As shown, the shaft 65 is mountedbelow the drum 18 in bearings 66 secured on the inclined braces 23, and slidable on the shaft 65-is a clutch collar 67 which is yieldingly urged to the right of Figure 11 by a helical compression spring 68 to normally engage or apply the clutch. y Secured on one endof the counter shaft 65 is a large -sprocket wheel 69 whichv is constantly connected by a sprocket chain 70 with a sprocket wheel 71 secured on the projecting 'end of the usual transverse power take-olii' shaft 31 of the tractor. Journaled in a bracket 72 secured to the supporting frame -is a vertical rock shaft 73 which freely I passes through the ends of a brake band 74 embracing the periphery of the casing of clutch 64. The ends of this brake band are;- normally separated by a spring 75 to release the brake band and permit .the clutch casing to freely turn-therein. -Fixed to the rock shaft 73 is a cam 76 which cooperates with a cam 77 on the upper end of the brake band for applying the latter when the shaft 73 is turned to the right from 'the position of Figuresrll,

l2 and 14. Journaledu in a further bracket 78 secured to the supporting frame and to the bracket 72 isa second vertical rock shaft 79 on which is fixed a fork 80 engaging the clutch collar 67. A lever 81 is secured on the upper end of the rock shaft 79 and operativelyconnected by a link82'with a short' arm 83 of a lever 84 which is fixed on the upper end of the rock shaft 73 and has a pull rod 85 connectedto its longer inwardly projecting arm. This arrangement -is such that when the rod 85-is pulled rearwardly a iven distance, the clutch collar 67 willbe 4shifted against the action of spring 68 to release the clutch 64, thereby permitting the shaft 65 to rotate without driving the clutch casing and the drum 18 and allowing the latter to turn freely so that 65 the cables' 19 may unwind therefrom, with the scoop or fork V39 automatically lowering by gravity', if raised. The arrangement 1s further such that when the rod 85 is pulled' rearwardly a greater distancethe clutch will remain released and the'brake band will be 7o applied to hold the clutch casing and drum. 18 against turning, thereby holding the scoop or fork 39 in the posit1on` to which 1t may have beenraised or lowered. In any event, the brake onlyj applied when the clutch is released, ,and the'cluteh is only` ap- .plied when thebrake is released. This permits continuous driving of shaft 65 and .continuous operation of the tractor engine, even A though the scoop isU only raised or lowered at different intervals as required in the use of the apparatus.

' As shown in Figures 11 to 15 inclusive, the clutch .is engaged and the brake. is released,

so that when the tractor engine is placed 85 into operation, the drum 18 will be rotated to elevate the scoop '.to the posit-ion of' Figure 10. The pull rod extends rearwardly to a point within convenient reach of the .drivers seat,\where it-is provided with a control level` or handle 86 loosel-y slidable through a guide slot in the upper end of a suitable supporting post or upright 87Lixed upon the tractor frame. .This post has a tooth 88 -within the.

slot arrangement to.selectiv.ely -engageirr notches 89 provided in the lower edge of the leveror handle 86, 'whereby to releasably hold the latter in any of its adjusted positions. `A spring 90 holds the lever 86 in engagement `with the tooth 88, and by lifting floo said lever against the action of the spring 90,V it may be disengaged' from the4 tooth 88 and moved to operate the clutch and brake.

.Otherwise, the construction of Figures '10 to 15 inclusive is subs'tantiallythe same as that of Figures 1 to 9 inclusive, and like reference characters are used to indicate co1'- responding parts in both instances.

- Inthe operation of the embodiment of the invention shown in Figures 104 to 15 in elusive, the. machine is propelled forwardl with 'the'scoop 3 9 lowered and with the lever 86 pulled rearwardly sothat the clutch 64 is released and the brake band 74 is applied to hold the scoop slightly above theground. After the scoopis loaded in this position, the lever 86 is raised and pushed forwardly to llt) release the brake band 74 and engage the .clutch 64, thereby driving the drum- 18 and causing the arms 22 to swing upwardly and raise the scoop. The lever 86 is then pulledV rearwardly to release the clutch 64 and apply i the brake so that the loaded scoop is held in raised position, whereupon, the machine is propelledto position the raised and loaded scoop over a Wagon or thelike for having the v load of the scoop4 dumped therein as described above in connection with the embodimentof Figures 1 to 9 inclusive. After the load has 'been dumped and the scoop has again been 130 righted, the lever 86 is moved partly forward, so as to release the brake band 74 withbrake band 74 andhold `the scoop inl position for reloading.

Devices construct-ed substantially as shown and described may be easily and economically manufactured and may be quickly applied to a conventional tractor to convert it4 into a self-propelled loading machine without changing the tractor constructlon, the attachment being operated from power derived from the engineof the tractor.

Minor changes maybe made without departing from the spirit and scope of the invention as claimed.

What I claim as new is:

1. A hoisting machine comprising a frame, a vertically' swinging arm pivoted thereto, a scoop pivoted to the free end of said arm, an extensible link connection between the back of the scoop and-said arm adjacent but rearwardly of the scoop pivot, and release means associated with said link connection Jr'or nor-v mally retaining the latter contracted and' thereby holding the scoop against dumping. 2. A hoistmg machine comprising a frame,

' a verticallyswinging arm'pivoted thereto, a

scoop pivoted to the free end of said arm, an extensible link connection between the back of the scoop and said arm adjacent but rearwardly of the scoop pivot, release means associated with said link connectionfor normally holding the scoop against' dumping, said release means embodying 'a latch pivoted to said arm, said link connection embodying a tube having a longitudinal. slot and a rod slidable in the tube and having a keeper lng movable in said slot and engageable by said latch. i

3. A hoisting machine comprising a frame, a vertically swinging hoisting arm pivoted thereon, a pivoted scoop carried by the free end of said arm, and releasable means to normally hold said scoop against dumping including a pioted latch on the armfand anY extensible link connection between the scoop and said arm embodying a rod attached to the scoop and having a keeper lug engageable by said 'latch.

4. A hoisting machine comprising a frame, a vertically swinging hoisting arm pivoted thereon, a pivoted scoop carried by the free end of said arm, releasable means to normally hold said scoop against .dumping` including a pivoted latch on the arm and an extensiblelink connection between the scoop and said arm embodying a rod' attached to.

the scoop and having a keeper lng engageablc by said latch, and means to swing said latch dmvnwardly out of engagement with said keeper lng.

5. A hoisting machine comprising a frame, a. vertically swinging hoisting arm pivotcd thereon, a pivoted scoop carried by the free endof said arm, relcasablc means to nor.

mally hold said scoop against dumping including a p'igoted latch' on the arm and an extensible linkconnection between the'scoop and said arm embodying a rod attached to the scoop and having a keeper lug cngageablc by said latch, and ine-ans to swing said latch downwardly ont otengagement with said keeper lng, mcludmg an arm rigidly c0nnccted to the latch and having a pull rope attached thereto.

(3. A hoisting machine comprising a frame a vertically swinging hoisting arm pivoted thereon, a pi voted scoop carried by the free end of said arm, releasable means to normally hold saidseoop against dumping including a pivoted lat-ch on the arm and an extensible link connection between they scoop and said arm embodying a rod attachedto the scoop and having a keeper lng engageable. by saidlatch, and a pull rope attached to the back of the scoop ,for returning the latter to normal position after dumping; v

7. A hoisting machine comprising a frame, a pair of vertically swinging arms mounted on said frame, a tilting scoop on the front ends of said arms, scoop holding latches on said arms, bars rigidly connecting said latches, and means for lowering; said bar to release said latches.

8. A. `hoisting machine comprising a frame,

a pair of vertically swinging arms mounted on -said frame, a tilting scoop' on the front ends of said-arms, scoop. holding latches on said arms, bars rigidly connecting" said latches, and means for lowering said bar to release said latches, including an arm rigid with the bar and having a pull member attached thereto.

In testimony whereof I afiix my signature.

' THEODORE lVERTHMAN. 

